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An Apparatus and Method for Real-Time Stacked Sheets Counting With Line-Scan Cameras.
- Source :
- IEEE Transactions on Instrumentation & Measurement; Jul2015, Vol. 64 Issue 7, p1876-1884, 9p
- Publication Year :
- 2015
-
Abstract
- To satisfy the requirement of quality control in printing and packaging industry, a sheet counting apparatus is developed, which adopts a line-scan camera to image the fringes of sheet stack and is able to provide a real-time and noncontact measurement of their quantity. With a brief introduction of the system architecture, our main work focuses on the sheet counting algorithms. The basic principle is to identify each sheet profile from the 1-D image with a robust ridge strength measurement. First, a multiscale bi-Gaussian ridge likelihood measurement and a ridge-valley descriptor are utilized to improve adjacent objects detection by increasing local contrast around sheet fringes. Then, a sheet recognition scheme, which integrates a peak detection algorithm and the ridge region criteria for verification, is proposed to discriminate true sheets from the obtained ridgeness measure. According to experiments and tests in real production lines, our apparatus can reach a very high measuring accuracy for printing papers or cards with a thickness not <0.2 mm. [ABSTRACT FROM PUBLISHER]
- Subjects :
- PRINTING industry
PACKAGING industry
QUALITY control
ALGORITHMS
PRINTING paper
Subjects
Details
- Language :
- English
- ISSN :
- 00189456
- Volume :
- 64
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Instrumentation & Measurement
- Publication Type :
- Academic Journal
- Accession number :
- 103139048
- Full Text :
- https://doi.org/10.1109/TIM.2014.2366977